Cumulative Update KB4056892 Windows 10 v1709 Build 16299.192

Avira users, you need to make sure you're on 15.0.34.17; after updating Avira to .17, it will create the required Registry keys. I was on 15.0.34.16 as of this morning, but forcing Avira to check for updates prompted the .17 update which did take ~5 minutes to install on an i5-8600K / 250GB 960 EVO / 16GB RAM system.

After you get the .17 update, it will create the required Registry keys. I did not have the keys before the Avira update; immediately after the update, the keys were automatically made properly.

So, PSA: update your antivirus. It must create the new Registry keys and most AV are just updating today, or maybe not even yet. Only after those keys are present, apparently, will you be offered the WU prompt. And this makes sense: without the Registry keys, the fix actually does not activate, per MS's article.

I'm off to reboot and begin this long journey of chipocalypse.

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Haha, ninja'd! I just discovered this. And I think this is a critical point as apparently these pre-updated AVs can cause BSODs:

"Microsoft's testing revealed a "small number" of antivirus programs are making unsupported calls into Windows kernel memory, which result in blue screen of death (BSOD) errors. To avoid causing widespread BSOD problems Microsoft opted to only push its January 3 security updates to devices running antivirus from firms that have confirmed their software is compatible."

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This KB4058702 apparently is freshly baked and out of the oven. It has to do with some serious security vulnerability speculation on some Intel CPUs. All that I am saying is that I didn't get it, meaning I am probably not concerned. I will trust MS on this one. If you got it and it installed successfully, that's a good sign and you are good to go. Like you said, there is not much detailed information about this critical update..:)

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